Temporarily off air message

I'm getting "Temporarily off air messages" on several channels including Syfy, National Geographic and now TCM. These seem to occur about three hours after I turn on the channel. I caught the message coming on when I was recording something and it asked me to press a confirm button then went to the message. I've tried resetting the cable box and that doesn't work. If I change channels and return, the message goes off, but it's a nuisance if I have to get up at three in the morning to do this if I'm recording something I want to watch the next day.